Air intake configuration for an agricultural harvesting machine

1. An agricultural work vehicle, comprising:

a vehicle body having longitudinally extending sides;

an enclosed engine compartment within said vehicle body;

an air inlet in a respective one said vehicle body sides for intake of air into said engine compartment;

a grain bin forward of said engine compartment, and a grain bin extension skirt mounted on said vehicle body above said grain bin; and

an air intake housing in form of a shell member that defines an outer wall mountable as a separate member directly over said air inlet in said vehicle body side; an inner wall of the air intake housing is defined by a wall construction of the grain bin extension, said intake housing further comprising a forwardly extending portion mounted alongside said grain bin extension with an inlet opening oriented so as draw air primarily from an area forward of said engine compartment and above said vehicle body, said intake housing having an outlet in communication with said air inlet in said vehicle body.

2. The agricultural work vehicle as in claim 1 , wherein said forwardly extending portion comprises a forward edge, said inlet opening defined in said forward edge so as to draw air primarily from alongside of said grain bin extension.

3. The agricultural work vehicle as in claim 1 , wherein said forwardly extending portion comprises an upper edge, said inlet opening defined in said upper edge so as to draw air primarily from above said grain bin extension.

4. The agricultural work vehicle as in claim 1 , wherein said forwardly extending portion of said intake housing comprises a box-like structure mounted alongside said grain bin extension.

5. The agricultural work vehicle as in claim 1 , wherein said forwardly extending portion of said intake housing extends along at least a portion of a single side of said grain bin extension.

6. The agricultural work vehicle as in claim 1 , wherein said forwardly extending portion of said intake housing extends along at least a portion of each side of said grain bin extension.

7. The agricultural work vehicle as in claim 1 , wherein said grain bin extension comprises a double-wall construction with an inner wall and an outer wall, said intake housing defined by at least a portion of said double wall construction, said inlet opening defined in said outer wall such that air is drawn into a space between said inner and out walls and directed into said air inlet.

8. The agricultural work vehicle as in claim 7 , comprising a plurality of said inlet opening spaced around said grain bin extension.

9. The agricultural work vehicle as in claim 7 , further comprising a duct in communication with said space through said outer wall, said duct conveying intake air to a portion of said intake housing covering said inlet opening.

10. A method of supplying engine combustion and cooling air to an internal combustion engine of a work vehicle wherein the engine is housed in an engine compartment rearward of a grain bin and grain bin extension, and wherein an air inlet is provided in the vehicle body for intake of air into the engine compartment, the method comprising;

configuring an intake housing via a shell member that defines an outer wall for a housing of the air inlet the shell mountable as a separate member on the grain bin extension, such that a wall construction of the grain bin extension defines a portion of the housing of the air inlet; and

drawing air into the housing from an area forward of the engine compartment and above the vehicle body.

11. The method as in claim 10 , comprising drawing air into the intake housing primarily from an area alongside one or both sides of the grain bin extension.

12. The method as in claim 11 , comprising drawing air into the intake housing primarily from an area above one or both sides of the grain bin extension.

13. The method as in claim 11 , wherein the grain bin extension comprises a double-wall construction, wherein the engine air is drawn into a space between an inner and outer wall of the double-wall construction around at least a portion of the grain bin extension and into the air inlet.